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Proton radiation analysis of multi-junction space solar cells

We report experimental results of proton irradiations with various energies on InGaP/GaAs/Ge triple-junction (3J) solar cells. The 3J solar cells consisting of stacked three different sub-cells (InGaP top cell, GaAs middle cell and Ge bottom cell) were irradiated with various energies of protons. Pr...

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Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2003-05, Vol.206 (Complete), p.448-451
Main Authors: Sumita, T., Imaizumi, M., Matsuda, S., Ohshima, T., Ohi, A., Itoh, H.
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creator Sumita, T.
Imaizumi, M.
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description We report experimental results of proton irradiations with various energies on InGaP/GaAs/Ge triple-junction (3J) solar cells. The 3J solar cells consisting of stacked three different sub-cells (InGaP top cell, GaAs middle cell and Ge bottom cell) were irradiated with various energies of protons. Proton penetration depth was calculated by the TRIM program. Current–voltage characteristic under AM0 simulated light and the spectral response under color bias light of the 3J cells were measured before and after the irradiations. Relative damage coefficients were obtained based on the irradiated cell performance. The results have revealed that protons with energy of a few hundred keV cause the most severe damage on 3J cells because the GaAs middle cell has the least radiation tolerance among the three sub-cells.
doi_str_mv 10.1016/S0168-583X(03)00791-2
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subjects Proton radiation
Relative damage coefficients
Spectral response
Triple junction solar cell
title Proton radiation analysis of multi-junction space solar cells
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